Saatchi & Saatchi says in the release accompanying the poster that it "shows that everyone, not just the privileged few, holds the power in this debate."

Mayor of London Sadiq Kahn says in a release accompanying the poster: "This is the OBV that I have worked closely with over many years. They are doing what they do best, by encouraging higher voter turnout from under-represented communities."

There are 4 million black, Asian and minority ethnic people in the UK but Operation Black Vote says just half of them are likely to vote in the June 23 referendum on EU membership.

Simon Woolley, Director of Operation Black Vote, says in an emailed statement: "We want to urge BME communities to discuss and debate the big issues in this referendum such as equality, prosperity, and immigration. But above we want all communities to vote. For many of us, and especially for our children, this is our birthright too."